1 Candidates may only take a beta exam once. 2  Candidates who fail an exam must wait a period of five (5) calendar days, beginning the day after the failed attempt, before they may retest for the same exam.  Once passed, a candidate must wait a minimum of 180 days before taking the same exam with an identical exam number.
Some people swear that Cotton Eye Joe is also a euphemism for an STD, at least according to Urban Dictionary. Lines like if it hadn't be for cotton eye Joe, I'd been married a long time ago, certainly take on a whole new meaning is you believe that interpretation.
It seems that 'cotton to', 'cotton on to' all derive from the same root source, that is, the verb 'to cotton'. In the UK and its antipodes it has settled down as 'cotton on to', with the meaning 'form an understanding of' and in the USA it is 'cotton to', with the 'take a liking to' meaning.